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https://issues.apache.org/jira/browse/FLINK-23653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Anderson updated FLINK-23653:
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Affects Version/s: 1.13.2
> improve training exercises and tests so they are better examples
> ----------------------------------------------------------------
>
> Key: FLINK-23653
> URL: https://issues.apache.org/jira/browse/FLINK-23653
> Project: Flink
> Issue Type: Improvement
> Components: Documentation / Training / Exercises
> Affects Versions: 1.13.2
> Reporter: David Anderson
> Priority: Major
>
> The tests for the training exercises are implemented in a way that permits
> the same tests to be used for both the exercises and the solutions, and for
> both the Java and Scala implementations. The way that this was done is a bit
> awkward.
> It would be better to
> * eliminate the ExerciseBase class and its mechanisms for setting the
> source(s) and sink and parallelism
> * have tests that run with parallelism > 1
> * speed up the tests by using MiniClusterWithClientResource
> It's also the case that the watermarking is done by calling emitWatermark in
> the sources. This is confusing; the watermarking should be visibly
> implemented in the exercises and solutions.
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